How to change IP address in C ++?

Question

I need to do a few network-related things in C ++ that I would normally do with ifconfigon Linux, but I would like to do this without parsing the output of a group of system calls. What C or C ++ libraries can I use to determine up or down the network adapter, read or change the adapter IP address and network mask, and change the default DNS gateway?

Answer 1

Basically you need to make a bunch of ioctl calls using the socket descriptor (SIOCGIFADDR, SIOCADDRT). You can find examples of programs that use it in the Linux kernel source in the Documentation / networking section. Some other links that may be helpful:

• Network Interface Operations on AIX
• XBMC implementation (check CNetworkInterfaceLinux)

EDIT: let me also add that if your goal is desktop Linux, then you can use the DBUS API to query network parameters using NetworkManager.

• http://people.redhat.com/dcbw/NetworkManager/NetworkManager DBUS API.txt (sorry that some problems insert links into edits)

Answer 2

ifconfig, , : http://archive.ubuntu.com/ubuntu/pool/main/n/net-tools/net-tools_1.60.orig.tar.gz

Answer 3

NetworkManager API dbus / . (, , dbus/NetworkManager ...), , .

dbus ++ NetworkManager API (, , ).